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A058767 Numbers n such that n^2*2^n + 1 is prime. 0

%I

%S 2,4,12,52,100,108,160,2940,2964,17334,21768,41604,65208,72780

%N Numbers n such that n^2*2^n + 1 is prime.

%D Posting to NMBRTHRY(AT)LISTSERV.NODAK.EDU by _Mike Oakes_ Dec 30 2000 entitled "Gaussian analogues of the Cullen and Woodall primes."

%H <a href="/index/Ga#gaussians">Index entries for Gaussian integers and primes</a>

%t Do[ If[ PrimeQ[ n*2^(n/2) + 1 ], Print[n] ], {n, 1, 100000} ]

%o (PARI) is(n)=ispseudoprime(n^2*2^n+1) \\ _Charles R Greathouse IV_, Jun 13 2017

%K nonn

%O 1,1

%A _Robert G. Wilson v_, Jan 02 2001

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Last modified September 26 16:43 EDT 2020. Contains 337374 sequences. (Running on oeis4.)